211241504655263 has 4 divisors (see below), whose sum is σ = 220425917901168. Its totient is φ = 202057091409360.

The previous prime is 211241504655121. The next prime is 211241504655299. The reversal of 211241504655263 is 362556405142112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211241504655263 - 2⁸ = 211241504655007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211241504655763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4592206622918 + ... + 4592206622963.

It is an arithmetic number, because the mean of its divisors is an integer number (55106479475292).

Almost surely, 2^{211241504655263} is an apocalyptic number.

211241504655263 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

211241504655263 is a deficient number, since it is larger than the sum of its proper divisors (9184413245905).

211241504655263 is an equidigital number, since it uses as much as digits as its factorization.

211241504655263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9184413245904.

The product of its (nonzero) digits is 1728000, while the sum is 47.

Adding to 211241504655263 its reverse (362556405142112), we get a palindrome (573797909797375).

The spelling of 211241504655263 in words is "two hundred eleven trillion, two hundred forty-one billion, five hundred four million, six hundred fifty-five thousand, two hundred sixty-three".